150W MOSFET Amplifier with IRFP250x2

[kandimba]

Hi Moth Flutter, can you put photos from your amplifier. Bias current is something that can change because the temperature, mainly if you have hi bias and smal heathink.

 

[Moth flutter fire]

The circuit I used has made some changes, because the temperature of 2SA1837/2SC4793 is too high, I want to reduce its current, but the CISS of IRFP260 is too large. I increased the first -level driver

 

[Moth flutter fire]

I also made another version, but I burned and destroyed

 

[Moth flutter fire]

Hi Moth Flutter, can you put photos from your amplifier. Bias current is something that can change because the temperature, mainly if you have hi bias and smal heathink.

Hello, the circuit I made, and the current has gradually decreased from turning on

 

[dungdochi1978]

Hi. Will it work if I change the circuit of Nmos300 like this?

 

[hassan4119]

This circuit is upgrade on BUZAMP from Elektor. Use only N-mosfets, with +/-50V DC give 150W on 4R load.

Hi Mr mile.i have many irfp250M...(not irfp250/irfp250N)
Can I use in apex nx14 or nx400?
And I made many amp..why in ofthen your amplifier use a1837/c4793? They are very expensive and finder in my location.
Can I replace with A940/c2073؟

 

[Moth flutter fire]

The voltage is high, please use A1837, the voltage is low, please use A940

 

[Joel Wesseling]

How many people have NX400 running and what PCB version do you have?

 

[Freecrowder]

Yes that would be interesting to know. I have some boards from a few years back that just say NX400 on the backside. They look like mono boards. I only see one input from the front. Is there any info on these or a thread? This may be it. Mine has 6 total outputs, 3 per side. I plan on using IRFP250s bc I have alot of them. How high can you go with rail voltages if you make changes to cap ratings?